2020 BMW i8 tire size
Most common factory size
P215/45R20
- Factory sizes
- 1
- Across 1 trim
- Trims with no size
- 1
- Diameter
- 27.62 in
- Revs per mile
- 730
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P215/45R20 | AWD | 215 | 45 | 20 | 27.62 | 3.81 | 730 |
What P215/45R20 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 215 mm | Tread width. 8.5 in. |
| Sidewall | 45 | Sidewall height is 45% of the width. |
| Construction | R | Radial tire. |
| Rim | 20 in | Fits 20 in wheels. |
Other sizes that fit
Within 3% of the stock diameter. A common shop guideline, not a maker spec.
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 175/55R20 | 20 | 27.58 | -0.1% | 60.1 mph |
| 275/35R20 | 20 | 27.58 | -0.1% | 60.1 mph |
| 275/40R19 | 19 | 27.66 | +0.2% | 59.9 mph |
| 245/45R19 | 19 | 27.68 | +0.2% | 59.9 mph |
| 155/70R19 | 19 | 27.54 | -0.3% | 60.2 mph |
| 245/40R20 | 20 | 27.72 | +0.4% | 59.8 mph |
| 275/30R21 | 21 | 27.50 | -0.4% | 60.3 mph |
| 245/35R21 | 21 | 27.75 | +0.5% | 59.7 mph |
Checked against 292 factory sizes listed for 2009-2027 US models.
What this cannot tell you
Tire pressure is on the driver door sticker. Not in this data.
Optional wheel packages may differ.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ